Electric hoisting device



Nov. 4 1924. 1,513,738

5; BQMBORN ELECTRIC HOISTING DEVICE Filed April 17. 1922 2 Sheets-Sheet 1 r ,22 12 13 31 1 [Fig.2. 348 42 as 1 31 43 Fig.6. 25 44 [n wen Z02" Bernkard Bomborn Nov. 4 1924. 4.

B. BOMBORN ELECTRIC HOISTING DEVICE Filed April 17. 1923 2 Sheets-Sheet 2 5s 5/? 56 57 53 i ii J Ti 3.

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Patented Nov. 4, 1924.

. j UNITED STATES PATENT OFFICE.

BERNHARD BOMBORN, 0F BERLIN, GERMANY.

ELECTRIC HOISTING- DEVICE.

Application filed April 17, 1922. Serial No. 554,103.

To all whom it may concern:

Be it known that I, BERNHARD BOMBORN, a citizen of Germany, residing at Berlin, German have invented certain new and useful mprovements in Electric Hoisting Devices, of which the following is a specification.

This invention relates to an electric hoisting device for use as a hoisting tackle or a winch, with a rope drum, into which is placed wholly or partially the motor and the gearing. The invention is characterizedby simple gearing with high gear ratio, which need only consist of toothed gearing; by the possibility of allowing the rapidly rotating toothed wheels to run continually in an oil bath; by the convenient dismantling for effectin repairs; by the/favourable 'dispos1- tion 0 the limiting switch for limiting the hoisting movements of the load and by the convenient application of the controller.

In the drawings affixed to this specification and forming part thereof, several devices embodyingmy invention are illustrated diagrammatically by way of example. In the drawings- Figs. 1 and 2 show one embodiment of the hoisting device, Fig. 1 being a section on the line I--I of Fig. 2 viewed-from the r1 ht, Fig. 2 being a longitudinal section. he controlling rope lever 66 shown in dot and dash lines in Fig. 1, is disposed to the right of the section in Fig. 2.

Figs. 3 and 4 show a second modification, Fig. 3 being a section on the line III-III of Fig. 4 viewed from the right and Fig. 4 a longitudinal section.

Figs. 5 and 6 show the hoisting device in the form of a wall winch. Fig. 5 being a section on the line VV of Fig. 6 viewed from the right and Fig. 6 a longitudinal section. In Fig. 6 the controller ropes shown at the right of Fi 2 are omitte ig. 7 is a section of the brake device on the line VII-VII of Fig. 8 viewed from the which surrounds the motor shaft 4, The motor casing 5 is provided with a flange 6.

Adjacent the other end of the drum is pro- 'plates placed on edge. The lower rod 11 may at 12 be provided with a wood framing with U-irons 13 foiK rotecting the drum fron'rthe loose rope pu ley to which the load hook is attached.

In the interior of the drum is provided a second partition 15. This surrounds the boss 16 of the flanged cover 7, through which passes the shaft 18, connected to the motor shaft 4 by a coupling 17 the end of the shaft 18 bearing the brake disc 19. The boss is supported in partition 15. The motor pinion 2O meshes with two toothed wheels 21, 22 the spindles of which are mounted in the partitions 2, 15. On these shafts are mounted pinions 23, 24, which gear with an internally toothed ring 25 rotatably mounted on the boss 16. A pinion 26 connected to the ring 25 gears with two toothed wheels 27, 28 which are mounted on stub shafts 29, 30 provided on the flange 7-, and these toothed wheels in turn gear with the internally toothed rim 31 of the hoisting drum 1. The rapidly rotating wheels 20, 21, 22 are completely enclosed and may continually run in oil. The wheels 21, 22 may be introduced and mounted in position through two lateral openings (not s own and closed tightly by flanged covers) in the partition 2.

The operation is as follows. When the motor armature is rotating the pinion 20 drives the wheels 21 and 22 whose pinions 23, 24. turn the internally toothed ring 25.

The pinion 26, connected to the latter, drives the wheels 27, 28. These rotate the toothed rim 31 of the drum-and thus also this drum. The wheels 21, 22 rotate around their axes and simultaneously turn around the motorpinion 20 so that the wheels 21', 22

transmit both their rotation around their re-- casing 32, wiith slots 33 for the passage ofthe rope 14. The supporting rod 8 has its Fig. 1 are in this case replaced by annular fianges 37, 38. To 37 is secured the'motor casing 39, and to 38 the cover 40, provided with the stub shafts 29, 30 (as in Fig.

'2) and with the sleeve surrounding shaft 18.

By tightening the nuts 41, 42, 43, 44 the flange rings 38, 37 are forced tightly against the sheet metal casing 32. The ring 37 therefore supports the motor and the ring 38 the part carrying the gearing and tliecontrolling parts to be described hereinafter.

Figs. 5 and 6 principally differ from Figs. 3 and 4 only by reason of the fact, that the rings 37 and 38 are in the form of wall brackets, 45, 46'with fianges 47, 48, which may be secured to a support or to a wall so that a. stationary winch is provided.

The controllig mechanism and brake now to be described :are illustrated on a larger scale in Figs. 7 and 8. They are enclosed in a hood 47 secured to the covers 7 (Fig. 1) or 40 (Figs. 4 and 6).

Fig. 7 shows the usual form of construction of the brake leverswith the brake weight 48 for the brake disc 19. 49 is a spindle carrying a travelling nut 50. In Fig. 2

' this spindle is driven direct by the wheel 28,

to which it is connected by aid of a flange at its left hand end. In Fig. 8, however a separate wheel 51 is mounted thereon which is driven by the toothed wheel 26 (in this case the toothed wheels 27, 28 of Fig. 1 are not arranged in a vertical plane. but in'a horizontal plane) by means of the toothed wheels 52, 53. When the travelling nut bears against the adjustable limiting nuts 54,, 55 which can be locked in position at the end of its movement its upper projection I 56 (shown in dotted lines in Fig. 8 as it is actually disposed outside the section G-H) sliding along a slot in the sleeve 57 turns this sleeve 57. The roller 60 of the brake lever 61, which previously rested on one of the cam surfaces 58 or 59, is thus lowered into the position shown in Fi 7 and the brake is applied. The sleeve 5 is also provided with a toothed segment 62 which turns the controller 63 mounted vertically in the hood 47, and switches off the current.

In this manner the hoisting movement is stopped when the load hook reaches its highest and lowest positions.

The starting and stopping of the movement by hand is effected in the known manher by pulling the controlling ropes 64, 65.

The double armed lever 66 transmits the movement to the sleeve 57. For a return to the middle position there is provided the known arrangement with a return spring 67.

The switch lever 66 might also be operated by electromagnets when it is desired to effeet the control from a distance.

Fig. 4 shows that'after removing the two nuts 42 and 44 the transmission gear can be withdrawn to the right and removed as a whole provided that the pinion 20 is small enough to pass through opening. in the hub 15.

I wish it to be understood that I do not desire to be limited: to the exact details of construction shown and described, for ob vious modifications will occur to a person skilled in the art.

I claim 1. Electric hoisting device comprising in combination, a hoisting drum, an electromotor located partly within said drum, a

partitionextending across said drum, a spine dle mounted in said partition, a toothed wheel mounted on said spindle, a motor pinion in gear with said toothed wheel, an internally toothed rim formed in said drum and gearing between said wheel and said rim for transmitting onto said rim both the rotation of said wheel about its own axis andits revolution about the-drum axis.

2. Electric hoisting device comprising in combination, a hoistin drum, an eleotromotor located partly Wltfil "11 said drum, 2.. eas

ing. surrounding said electromotona hub secured to said casing, said drumbeing mounted on said hub, a arti-tion extending across said drum, a spin le mounted in said partition, a toothed wheel'mounted on said spindle, a motor pinion in gear with said toothed wheel, an internally toothed rim formedinsaid drum and gearing between said wheel and said rim for transmitting onto said rim both the rotation ofsaid wheel about its own axis and the revolution about the drum axis.

,3. Electric hoisting device comprising in combination, a hoistin drum, an electromotor located partly within said drum, two

partitions extending substantially in paralel across said drum and forming between them an oil-chamber, a spindle mounted in said partitions, a toothed wheel on said spindle within said chamber, and a pinion on said spindle without said chamber, a motor pinion in gear with said wheel, a boss supported in one of said partitions an in ternally toothed ring rotatably mounted on said boss in gear with the pinion on said spindle, an internally toothed rim formed on said drum and a toothed wlieel gearing with said rim and driven by said" ring.

4. Electric hoisting device comprising in combination, a hoisting drum, an electromotor located partly within said drum, two partitions extending'substantially in parallel across said drum and formingbetween them an oil-chamber, two spindles mounted in said partitions, a toothed wheel on each of said spindles within said chamber, and a pinion on each of said spindles without said chamber, a motor'pinion in gear with said wheel, a boss'supported in one ofsaid partitions, an internall toothed ring rotatably mounted on sai boss in gear with the pinions on said. spindles, an internally toothed rim formed on said drum and a toothedwheel gearing with said and driven by said ring. a I

5. Electric hoisting device comprising in combination, a hoistin drum, an electromotor located partly wlthin said drum, two partitions extending substantially in parallel across said. drum and forming between them an oil-chamber, a spindle mounted in said artitions, a'toothed wheel on said spind e within said chamber, and a inion on said indle without said cham r, a motor pinion in gear with said wheel, a boss supported in one of said partitions, an internally toothed ring rotatably mounted on said boss in arwith the pinion on said spindle, an internally toothed rim iormed on said drum, a toothed wheel gearing with said rim and driven by said ring, a controller, a limiting switch spindle operatively connected with saidplanetary.

wheel, a traveling nut on said spindle and means adapted to be influenced by said nut for varying the operative condition of combination, a hoistin said controller.

6.'Electric hoisting device comprising in v drum, an electromotor located partly withinsaid drum, two partitions extending-substantially in parallel across said drum and forming between said partitions, a toothed wheel on said spindle within said chamber, and a inion onsaid spindle without said cham er, a motor pinion in gear with said wheel, a boss supported in one of said partitions, an interna ly toothed ring rotatably mounted on said boss in gear with the pinion on said spindle, an internally toothed rim formed on said drum, a toothed'wheel gearing with said rim and driven-by said ring, a controller, a limiting switch spindle operatively connected. with said laneta wheel, a travelin nut on said spindle, a slotted sleeve in parafiel with said spindle and adapted to be turned by said nut and a lever on saidsleeve for operatin said controller.

7. Electric hoisting evice comprising in combination, a hoistm drum, an electromotor located partly within said drum, two partitions extending substantially in. parallel acrosssaid drum and forming between them anoil-chamber, a spindle mounted in said partitions, a toothed wheel on said spindle within said chamber and a inion on said spindle without said cham r, a motor pinion in gear with said wheel, a boss suplported in one of said partitions, an interna y toothed ring rotatably mounted on said boss in gear with the pinion on said spindle, an internally toothed rim formed on said drum, a toothed wheel gearing with said rim and driven by said ring, a casing surrounding'said drum, a centering ring at either end of said casing and bolts traversing said rings adapted to force them against said casing, one of said rings formin a support for said boss.

n testimony whereof I aflix m si ature. BERNHARD BO 

